Peat often recommends to first try to solve the problem with diet (adequate protein, a piece of fruit or juice between meals). When taking T3, 10 - 15 mcg per day is a good dose (taken in small amounts throughout the day). He mentioned that the body normally produces about 4 mcg of T3 in an hour. Don't forget that you get a little from Thyromax and that you produce your own T3 (thyroid gland, liver).
Peat has suggested a tiny nibble of a T3 tablet every hour or two as needed. I take that to mean ~1-2 mcg at a time.